A teacher is calling on the police to help root out some pupils who are taking drugs, claiming it is 'obvious' children are high in class.

The unnamed teacher claims some pupils at Swindon's Commonweal school are shoving drugs into their underwear to avoid getting caught and are routinely turning up to lessons high, with 'red eyes'.

The tutor said some students are "obviously high in lessons" - and even boasting to teachers about taking tranquilizers.

“The pupils tend to put the drugs down their underwear because they know we can’t obviously search there and the police can only search them if they are arrested," the teacher told the Swindon Advertiser:

Is this the solution? The teacher wants police to send in sniffer dogs to catch the culprits (Image: Getty)

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“It is obvious they are high in lessons. They will come in and in some cases they are taking more than just cannabis because they are not shy to talk about it. They come in with red eyes and they are staring into space most of the time and so to get them to do any work is hard."

The whistleblowing tutor said searches of some pupils' bags have proved fruitless and is now calling for police sniffer dogs to visit the school.

They claim the problem was exposed after neighbours complained about some students smoking drugs before school.

In a letter to parents Commonweal head teacher Keith Defter said the school remained a "safe and secure environment for pupils." He also said there had been "no long-term escalation of drug-related incidents at the school."

He did however acknowledge concerns had been raised by members of the local community about some students behaviour when gathering before school -which led to increased police patrols.

In the letter he said: "We are neither complacent nor naïve, it would be folly to deny that in our community some adolescents will ‘experiment’ with illegal substances and push boundaries. However, when this has been brought to our attention we have been swift to take action.

"It is worth noting that on the only occasion a student was found in possession of illegal substances on school premises, they were immediately arrested, charged and subsequently permanently excluded."

A spokesman for Wiltshire Police said they currently have no plans to patrol the school or bring in sniffer dogs.